using System.Collections;
using System.Collections.Generic;
using UnityEngine;

namespace Saltosion.OneWeapon {
    public class Explodable : MonoBehaviour {
        public GameObject[] BodypartPrefabs;
        public bool DebugExplode = false;
        [Tooltip("This only applies if this GameObject also has the Health component.")]
        public bool KillOnZeroHealth = true;

        private CameraFX CameraFX;
        private PlayerFun PlayerFun;
        private Health Health;

        private void Start() {
            foreach (GameObject Obj in BodypartPrefabs) {
                Rigidbody2D Body = Obj.GetComponent<Rigidbody2D>();
                if (Body == null) {
                    Debug.LogError($"'{Obj.name}' is an explodable bodypart, and does not have a Rigidbody2D!\n\n" +
                        "Therefore it cannot be exploded. Please provide one.\n" +
                        "Following is the GameObject that needs to get a Rigidbody2D.");
                }
            }

            CameraFX = Camera.main.GetComponent<CameraFX>();
            PlayerFun = GameObject.FindGameObjectWithTag("Player").GetComponent<PlayerFun>();
            Health = GetComponent<Health>();
        }

        private void Update() {
            if (DebugExplode) {
                DebugExplode = false;
                Explode(false);
            }

            if (Health != null && Health.CurrentHealth <= 0 && KillOnZeroHealth) {
                Explode(true);
            }
        }

        public void Explode(bool destroyGameObject) {
            int Count = Mathf.Clamp((int)(BodypartPrefabs.Length * Random.value + 1), 1, BodypartPrefabs.Length);
            for (int i = 0; i < Count; i++) {
                GameObject Obj = BodypartPrefabs[i];

                // No body parts flying in censored mode
                float DirectionRadians = Random.value * Mathf.PI * 2.0f;
                Vector2 Direction = new Vector2(Mathf.Cos(DirectionRadians), Mathf.Sin(DirectionRadians));
                if (!Options.CensorGore) {
                    GameObject NewObj = Instantiate(Obj, transform.position, new Quaternion(), null);
                    Rigidbody2D Bodypart = NewObj.GetComponent<Rigidbody2D>();
                    if (Bodypart == null) {
                        continue;
                    }
                    float Force = 0.5f + Random.value * 0.5f;
                    Bodypart.AddForce(Direction * Force, ForceMode2D.Impulse);
                    Bodypart.AddTorque((Random.value - 0.5f) * Force, ForceMode2D.Impulse);
                }

                // Blood is replaced by flowers though, no problem  with that
                BloodLauncher.Splatter(transform.position + (Vector3)Direction * 0.5f, Vector2.zero, 70, 50f, 360f);
            }

            PlayerFun.Explosion(false);
            CameraFX.ScreenShake(10);

            if (destroyGameObject) {
                Destroy(gameObject);
            }
        }
    }
}